US9046904B2 - Apparatus and method for controlling pulse frequency modulation in single-inductor dual-output power circuit - Google Patents
Apparatus and method for controlling pulse frequency modulation in single-inductor dual-output power circuit Download PDFInfo
- Publication number
- US9046904B2 US9046904B2 US13/768,310 US201313768310A US9046904B2 US 9046904 B2 US9046904 B2 US 9046904B2 US 201313768310 A US201313768310 A US 201313768310A US 9046904 B2 US9046904 B2 US 9046904B2
- Authority
- US
- United States
- Prior art keywords
- minimum
- time
- pulse signal
- voltage converter
- maximum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators without using an external clock
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
Definitions
- Liquid crystal panels may use a single-inductor dual-output power.
- a plurality of boost voltage converters sharing a single inductor may produce single-inductor dual-output power, which may be used to apply positive and negative power to a liquid crystal panel.
- Example FIG. 1 illustrates a circuit diagram of a single-inductor dual-output power circuit, in accordance with the related art.
- the single-inductor dual-output power circuit 100 may include a boost voltage converter 110 and a buck-boost voltage converter 120 .
- the boost voltage converter 110 may apply a positive voltage DDVDH for a liquid-crystal drive to a load R 1 .
- a buck-boost voltage converter 120 may apply a negative voltage DDVDL to a load R 2 .
- the boost voltage converter 110 and the buck-boost voltage converter 120 share a first switch element M 1 , a second switch element M 2 , and an inductor L.
- the boost voltage converter 110 and the buck-boost voltage converter 120 include diodes D 1 and D 2 for performing rectification functions, capacitors C 1 and C 2 for performing smoothing functions, serial buffers B 1 through B 4 for adjusting rising and falling times, respectively.
- a single-inductor dual-output power circuit 100 may allow the first switch element M 1 and the second switch element M 1 to perform alternate switching operations by a first switch control signal CNT 1 and a second switch control signal CNT 2 , which may be applied from an apparatus for controlling a pulse frequency modulation.
- the result of the signal CNT 1 may be generation of the positive voltage DDVDH and the negative voltage DDVDL.
- the generated positive and negative voltages DDVDH and DDVDL may be provided to the loads R 1 and R 2 , respectively.
- a period when both the first switch element M 1 and the second switch element M 2 are turned-on may be referred to as a maximum on-time.
- An on-time pulse signal used for the maximum on-time may be set to have a preset period.
- the second switch element M 1 is turned-on and the first switch element M 1 is turned-off, the current passing through the inductor L is charged into the first capacitor C 1 , which may cause a rise of the positive voltage DDVDH.
- the first switch element M 1 is turned-on and the second switch element M 2 is turned-off, the current passing through the inductor L is charged into the second capacitor C 2 , which causes a drop in the negative voltage DDVDL.
- both the first and second switch elements M 1 and M 2 are turned-off, the current passing through the inductor L is charged into both the first and second capacitors C 1 and C 2 , which may cause the positive voltage DDVDH to rise and the negative voltage DDVDL to fall.
- a period when at least one of the first and second switch elements M 1 and M 2 is turned-off may be referred to as the minimum off-time.
- An off-time pulse signal may be used for defining the minimum off-time to a preset period.
- EMI noise and electromagnetic interference
- FIG. 2 illustrates a waveform diagram of a current of the inductor when a maximum on-time pulse signal and a minimum off-time pulse signal have fixed periods, in accordance with the related art.
- a first interval INTERVAL 1 indicates a period that the first switch element M 1 is alternately turned on and turned off while the second switch element M 2 maintains a turned-on state.
- a second interval INTERVAL 2 indicates a period that both the first and second switch elements M 1 and M 2 are alternately turned on and turned off.
- the current I L of the inductor L may decreases with an inclination of (DDVDH ⁇ VCI)/L even though the turning-on voltage of the first diode D 1 is disregarded.
- INTERVAL 2 when the positive voltage DDVDH rises and the negative voltage DDVDL falls, the current I L of the inductor L decreases with an inclination of ‘(DDVDH+
- the inductor current I L may suddenly increase depending on the controlled states, as shown in FIG. 2 .
- Embodiments relate to controlling a single-inductor dual-output power circuit.
- Embodiments relate to an apparatus and method for controlling a pulse frequency modulation in a single-inductor dual-output power circuit having a boost voltage converter and buck-boost voltage converter.
- Embodiments relate to an apparatus and method for controlling a pulse frequency modulation, which are adapted to adjust a pulse width of one of on-time and off-time pulse signals, which may prevent a undesirable over increments in a peak current flowing through an inductor.
- Embodiments relate to an apparatus configured to fix a pulse width of: (1) a maximum on-time pulse signal which is used to define a maximum on-time during which a current flowing through the inductor is generated and/or (2) a minimum off-time pulse signal which is used to define a minimum off-time during which either the boost voltage converter or the buck-boost voltage converter produces a positive voltage or a negative voltage.
- an apparatus is configured to adjust a pulse width of the other pulse signal.
- the pulse width of the other pulse signal may be adjusted depending on a comparison resultant of the positive voltage with a first reference value and a comparison resultant of the negative voltage with a second reference value.
- an apparatus comprises at least one of: (1) A first comparison unit configured to compare the positive voltage with the first reference value. (2) A second comparison unit configured to compare the negative voltage with the second reference value. (3) A controller configured to generate a pulse width adjustment signal which is used to adjust the pulse width of the other pulse signal, switch control signals for the boost voltage converter and the buck-boost voltage converter on the basis of the comparison resultants from the first and second comparison units. A pulse width adjuster configured to adjust the pulse width of the other pulse signal according to the pulse width adjustment signal.
- the pulse width adjuster is configured to adjust a pulse width of the maximum on-time pulse signal and adjust a first minimum off-time pulse signal for defining: (1) a first minimum off-time during which the boost voltage converter outputs the positive voltage, (2) a second minimum off-time pulse signal defining a second minimum off-time during the buck-boost voltage converter outputs the negative voltage, and (3) a third minimum off-time pulse signal defining a third minimum off-time during which the boost voltage converter outputs the positive voltage and the buck-boost voltage converter outputs the negative voltage.
- the first minimum off-time pulse signal is adjusted to have the widest pulse width of the first minimum off-time pulse signal, the second minimum off-time pulse signal, and the third minimum off-time pulse signal.
- the second minimum off-time pulse signal is adjusted to have an intermediate pulse width less than the first minimum off-time pulse signal and greater than the third minimum pulse signal.
- the third minimum off-time pulse signal is adjusted to have a pulse width less than both the first and second minimum pulse signal.
- the method comprises at least one of: (1) Fixing a pulse width of any one of the maximum on-time pulse signals, which is used to define (a) a maximum on-time during which a current flowing through the inductor is generated and (b) a minimum off-time pulse signal which is used to define a minimum off-time during which either the boost voltage converter or the buck-boost voltage converter produces a positive voltage or a negative voltage. (2) Adjusting a pulse width of the other pulse signal.
- the adjusting a pulse width of the other pulse signal comprises adjusting the pulse width of the other pulse signal depending on a comparison resultant of the positive voltage with a first reference value and a comparison resultant of the negative voltage with a second reference value.
- FIG. 1 illustrates a circuit diagram of a single-inductor dual-output power circuit, in accordance with the related art.
- FIG. 2 illustrates a waveform diagram of a current of the inductor when a maximum on-time pulse signal and a minimum off-time pulse signal each have fixed widths, in accordance with the related art.
- FIG. 3 illustrates a circuit diagram of an apparatus for controlling a pulse frequency modulation in a single-inductor dual-output power circuit, in accordance with embodiments.
- FIG. 4 illustrates a waveform diagram illustrating a current of the inductor when the width of a minimum off-time pulse signal is adjusted, in accordance with embodiments.
- FIG. 5 is a circuit diagram of an apparatus for controlling a pulse frequency modulation in a single-inductor dual-output power circuit, in accordance with embodiments.
- FIG. 3 illustrates a circuit diagram of an apparatus for controlling a pulse frequency modulation in a single-inductor dual-output power circuit, in accordance with embodiments.
- An apparatus 200 for controlling a pulse frequency modulation may include first and second comparison units 210 and 220 , a controller 230 , and a pulse width adjuster 240 .
- the first comparison unit 210 compares a positive voltage DDVDH (e.g. which may be applied from a boost voltage converter 110 of a single-inductor dual-output power circuit 100 ) with a first reference value REF 1 .
- the second comparison unit 220 may compare a negative voltage (e.g.
- the controller 230 may derive pulse width adjustment signals CP and CN, and first and second switch control signals CNT 1 and CNT 2 from comparison resultants CMPOP and CMPON from the first and second comparison units 210 and 220 .
- the pulse width adjustment signal CP and CN may be used to adjust the pulse width of at least one of a maximum on-time pulse signal and a minimum off-time pulse signal (e.g. the pulse width of the minimum off-time pulse signal).
- the first switch control signal CNT 1 may be used to control the buck-boost voltage converter 120 .
- the second switch control signal CNT 2 may be used to control the boost voltage converter 110 .
- the pulse width adjuster 240 may control the pulse width of at least one of the maximum on-time and the minimum off-time pulse signal (e.g. the pulse width of the minimum off-time pulse signal depending on the pulse width adjustment signals CP and CN).
- the apparatus 200 may include a maximum on-time counter 250 and a minimum off-time counter 260 .
- the maximum on-time counter 250 may start to count a maximum on-time of a fixed pulse width in response to the first and second switch control signals CNT 1 and CNT 2 and may generate the maximum on-time pulse signal MaxOn.
- the minimum off-time counter 260 may start to count the minimum off-time of a pulse width which may be adjusted and determined by the pulse width adjuster 240 when the counting of the maximum on-time in the maximum on-time counter is terminated. Through the counting operation, the minimum off-time counter 260 generates the minimum off-time pulse signal MinOff.
- Example operations of the apparatus 200 having the above-mentioned configuration are described below, with reference to FIG. 1 and FIG. 4 , in accordance with embodiments.
- the single-inductor dual-output power circuit 100 shown in FIG. 1 may driven by the first and second switch control signals CNT 1 and CNT 2 provided from the apparatus 200 .
- a current flowing through the inductor L may be generated and then either a positive voltage DDVDH is output from the boost voltage converter 110 or a negative voltage DDVDL is output from the buck-boost voltage converter 120 .
- the first comparison unit 210 may compare the positive voltage DDVDH, which may be applied from the boost voltage converter 110 , with the first reference value REF 1 and may output a comparison resultant CMPOP.
- the second comparison unit 220 may compare the negative voltage DDVDL, which may be applied from the buck-boost voltage converter 120 , with the second reference value REF 2 and may output a comparison resultant CMPON.
- the controller 230 may generate pulse width adjustment signals CP and CN in response to the comparison resultants CMPOP and CMPON of the first and second comparison units 210 and 220 , in accordance with embodiments.
- the pulse width adjustment signals CP and CN may be used to adjust the pulse width of one of the maximum on-time and minimum off-time pulse signals MaxOn and MinOff (e.g. the pulse width of the minimum off-time pulse signal).
- the controller 230 may receive the maximum on-time pulse signal MaxOn generated in the maximum on-time counter 250 and the minimum off-time pulse signal MinOff generated in the minimum off-time counter 260 to perform feedback control.
- the controller 230 may generate a pulse width adjustment standby signal when both of the comparison resultants CMPOP and CMPON output from the first and second comparison units 210 and 220 have a low logic level. If the comparison resultant CMPOP output from the first comparison unit 210 has a low logic level and the comparison resultant CMPON output from the second comparison unit 220 has a high logic level, the controller 230 outputs the pulse width adjustment signals CP and CN for controlling a second minimum off-time pulse signal MinOff 2 for defining a second minimum off-time, in accordance with embodiments.
- the second minimum off-time pulse signal may cause the buck-boost voltage converter 120 to output the negative voltage DDVDL.
- the controller 230 outputs the pulse width adjustment signals CP and CN for controlling a first minimum off-time pulse signal MinOff 1 for defining a first minimum off-time, in accordance with embodiments.
- the first minimum off-time pulse signal may cause the boost voltage converter 110 to output the positive voltage DDVDH. If both of the comparison resultants CMPOP and CMPON output from the first and second comparison units 210 and 220 have a high logic level, the controller 230 may output the pulse width adjustment signals CP and CN for controlling a third minimum off-time pulse signal MinOff 3 for defining a third minimum off-time, in accordance with embodiments.
- the third minimum off-time pulse signal causes the boost and buck-boost voltage converters 110 and 120 to output the positive and negative voltages DDVDH and DDVDL, respectively.
- the pulse width adjuster 240 may then control the minimum off-time counter 260 to generate one of the first through third minimum off-time pulse signals as a minimum off-time pulse signal MinOff in response to the pulse width adjustment signals CP and CN applied from the controller 230 , in accordance with embodiments.
- the pulse width adjuster 240 performing the control of the minimum off-time counter 260 may set the first through third minimum off-time pulse signals MinOff 1 through MinOff 3 to have different widths from one another.
- the first minimum off-time pulse signal MinOff 1 may be set to have the widest pulse width
- the second minimum off-time pulse signal MinOff 2 may be set to have an intermediate pulse width
- the third minimum off-time pulse signal MinOff 3 may be set to have the smallest pulse width.
- FIG. 4 is a waveform diagram illustrating a current of the inductor when the width of a minimum off-time pulse signal is adjusted, in accordance with embodiments.
- a first interval INTERVAL 1 may be a period that the first switch element M 1 is alternately turned on and turned off while the second switch element M 2 maintains a turned-on state, in accordance with embodiments.
- a second interval INTERVAL 2 may be a period that the second switch element M 2 is alternately turned on and turned off during the first switch element M 1 maintains a turned-on state.
- a third interval INTERVAL 3 may be a period that both of the first and second switch elements M 1 and M 2 are alternately turned on and turned off.
- the current of the inductor L may decreases with an inclination of (DDVDH ⁇ VCI)/L even though the turning-on voltage of the first diode D 1 is not applied.
- the current of the inductor L may decrease with an inclination of (
- the current of the inductor L may decrease with an inclination of (DDVDH+
- the pulse width of the minimum off-time pulse signal MinOff may be controlled according to the respective control states. Accordingly, in embodiments, the current flowing through the inductor L may be charged into the capacitors C 1 and C 2 for sufficient time duration.
- an apparatus for controlling a pulse frequency modulation in accordance with embodiments may prevent the generation of noise and EMI in the single-inductor dual-output power circuit.
- apparatus 200 adjusts the pulse width of the minimum off-time pulse signal
- the adjustment of the pulse width of the maximum on-time pulse signal instead of that of the minimum off-time pulse signal may also provide the same or similar effect as mentioned above.
- FIG. 5 is a circuit diagram of an apparatus for controlling a pulse frequency modulation in a single-inductor dual-output power circuit, in accordance with embodiments.
- An apparatus 300 for controlling a pulse frequency modulation may include first and second comparison units 310 and 320 , a controller 330 , and a pulse width adjuster 340 , in accordance with embodiments.
- the first comparison unit 310 may compares positive voltage DDVDH applied from a boost voltage converter 110 of a single-inductor dual-output power circuit 100 , with a first reference value REF 1 .
- the second comparison unit 320 may compare a negative voltage applied from a buck-boost voltage converter 120 of the single-inductor dual-output power circuit 100 , with a second reference value REF 2 .
- the controller 330 may derive pulse width adjustment signals CP and CN and first and second switch control signals CNT 1 and CNT 2 from comparison resultants of the first and second comparison units 310 and 320 .
- the pulse width adjustment signal CP and CN may be used to adjust the pulse width of one of a maximum on-time pulse signal and a minimum off-time pulse signal (e.g. the pulse width of the maximum on-time pulse signal).
- the first switch control signal CNT 1 may be used to control the buck-boost voltage converter 120 .
- the second switch control signal CNT 2 may be used to control the boost voltage converter 110 .
- the pulse width adjuster 340 may control the pulse width of one of the maximum on-time and the minimum off-time pulse signal (e.g. the pulse width of the minimum off-time pulse signal depending on the pulse width adjustment signals CP and CN).
- the apparatus 300 may includes a maximum on-time counter 350 and a minimum off-time counter 360 , in accordance with embodiments.
- the maximum on-time counter 350 may start to count the maximum on-time of a pulse width which is adjusted and determined by the pulse width adjuster 340 , in response to the first and second switch control signals CNT 1 and CNT 2 . Through the counting operation, the maximum on-time counter 350 may generate the maximum on-time pulse signal MaxOn having the adjusted pulse width.
- the minimum off-time counter 260 may start to count a minimum off-time of a fixed pulse width and generate the minimum off-time pulse signal MinOff having the fixed pulse width, when the counting of the maximum on-time in the maximum on-time counter 350 is terminated.
- Example operations of the apparatus 300 having the above-mentioned configuration, for use in the single-inductor dual-output power circuit 100 will now be explained with reference to the circuit diagram of FIG. 1 , in accordance with embodiments.
- the single-inductor dual-output power circuit 100 shown in FIG. 1 may be driven by the first and second switch control signals CNT 1 and CNT 2 provided from the apparatus 300 . Accordingly, in embodiments a current flowing through the inductor L may be generated, and then a positive voltage DDVDH may be output from the boost voltage converter 110 and/or a negative voltage DDVDL can be output from the buck-boost voltage converter 120 .
- the first comparison unit 310 may compare the positive voltage DDVDH, which is applied from the boost voltage converter 110 , with the first reference value REF 1 and output a comparison resultant CMPOP.
- the second comparison unit 320 may compare the negative voltage DDVDL, which may be applied from the buck-boost voltage converter 120 , with the second reference value REF 2 and output a comparison resultant CMPON.
- the controller 330 may generate pulse width adjustment signals CP and CN in response to the comparison resultants CMPOP and CMPON of the first and second comparison units 310 and 320 , in accordance with embodiments.
- the pulse width adjustment signals CP and CN may be used to adjust the pulse width of one of the maximum on-time and minimum off-time pulse signals MaxOn and MinOff (e.g. the pulse width of the maximum on-time pulse signal MaxOn).
- the controller 330 may receive the maximum on-time pulse signal MaxOn generated in the maximum on-time counter 350 and the minimum off-time pulse signal MinOff generated in the minimum off-time counter 360 to perform feedback control.
- the pulse width adjuster 340 may then controls the maximum on-time counter 350 , in accordance with embodiments.
- the maximum on-time counter 350 may generate the maximum on-time pulse signal MaxOn with an adjusted pulse width which is adjusted by the pulse width adjustment signals CP and CN.
- Embodiments may adjust the pulse width for one of the maximum on-time pulse signal (which may define the maximum on-time during which a current flowing through the inductor is generated) and the minimum off-time pulse signal (which may define the minimum off-time during which the positive or negative voltage is output). Accordingly, the peak current flowing through the inductor may not increase excessively, making the inductor current stable. Therefore, the generation of power noise and EMI may be prevented.
- the maximum on-time pulse signal which may define the maximum on-time during which a current flowing through the inductor is generated
- the minimum off-time pulse signal which may define the minimum off-time during which the positive or negative voltage is output
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2012-0030652 | 2012-03-26 | ||
KR1020120030652A KR101259894B1 (en) | 2012-03-26 | 2012-03-26 | Pfm control apparatus for single inductor dual output power circuit and pfm control method therefor |
Publications (2)
Publication Number | Publication Date |
---|---|
US20130249507A1 US20130249507A1 (en) | 2013-09-26 |
US9046904B2 true US9046904B2 (en) | 2015-06-02 |
Family
ID=48665298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/768,310 Active 2033-08-12 US9046904B2 (en) | 2012-03-26 | 2013-02-15 | Apparatus and method for controlling pulse frequency modulation in single-inductor dual-output power circuit |
Country Status (2)
Country | Link |
---|---|
US (1) | US9046904B2 (en) |
KR (1) | KR101259894B1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104008737B (en) * | 2013-02-27 | 2016-04-13 | 奕力科技股份有限公司 | Single inductance dual output converter, control method and ON-OFF control circuit |
KR101640206B1 (en) | 2014-12-29 | 2016-07-15 | (주)자람테크놀로지 | Cross regulation reduced multiple output buck converter with charge control and converting method thereof |
US9577527B2 (en) * | 2015-03-20 | 2017-02-21 | Active-Semi, Inc. | Current metering for transitioning between operating modes in switching regulators |
US9698674B1 (en) | 2015-12-30 | 2017-07-04 | Silicon Laboratories Inc. | Timing based approach for efficient switched mode power conversion |
CN107147285B (en) * | 2017-05-31 | 2019-09-20 | 深圳芯智汇科技有限公司 | Control method, device and its storage equipment of DC-DC conversion circuit |
EP3796532B1 (en) * | 2019-09-19 | 2024-03-06 | Nxp B.V. | Soft start method for a single inductor multiple output power supply |
CN111162660A (en) * | 2020-01-08 | 2020-05-15 | 毛昭祺 | Multi-channel resonance conversion circuit and multi-channel output control method based on multi-channel resonance conversion circuit |
CN113489318A (en) * | 2021-06-09 | 2021-10-08 | 西安理工大学 | Method for controlling working mode of Buck converter |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6075295A (en) | 1997-04-14 | 2000-06-13 | Micro Linear Corporation | Single inductor multiple output boost regulator |
JP2004096816A (en) | 2002-08-29 | 2004-03-25 | Matsushita Electric Ind Co Ltd | Multi-output dc-dc converter |
US20040196676A1 (en) | 2003-04-01 | 2004-10-07 | Matsushita Electric Industrial Co., Ltd. | Multi-output DC-DC converter |
US6894465B2 (en) * | 2002-07-10 | 2005-05-17 | Marvell World Trade Ltd. | Power array system and method |
US7026795B2 (en) * | 2003-07-09 | 2006-04-11 | Advanced Analogic Technologies, Inc. | Method for pulse modulation control of switching regulators |
JP2007236141A (en) | 2006-03-02 | 2007-09-13 | Matsushita Electric Ind Co Ltd | Multiple output dc-dc converter and power supply device |
KR20080051657A (en) | 2006-12-06 | 2008-06-11 | (주)제이디에이테크놀로지 | The circuit and method of sensing inductor current in dc/dc converter |
US7443148B2 (en) * | 2006-09-11 | 2008-10-28 | Micrel, Inc. | Constant on-time regulator with increased maximum duty cycle |
US7482791B2 (en) * | 2006-09-11 | 2009-01-27 | Micrel, Inc. | Constant on-time regulator with internal ripple generation and improved output voltage accuracy |
US7782036B1 (en) * | 2008-01-07 | 2010-08-24 | National Semiconductor Corporation | Adaptive on-time control for switching regulators |
US8400131B2 (en) * | 2010-03-09 | 2013-03-19 | Analog Devices, Inc. | Voltage converter and LED driver circuits with progressive boost, skip, and linear mode operation |
-
2012
- 2012-03-26 KR KR1020120030652A patent/KR101259894B1/en active IP Right Grant
-
2013
- 2013-02-15 US US13/768,310 patent/US9046904B2/en active Active
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6075295A (en) | 1997-04-14 | 2000-06-13 | Micro Linear Corporation | Single inductor multiple output boost regulator |
US7622904B2 (en) * | 2002-07-10 | 2009-11-24 | Marvell World Trade Ltd. | Power array system and method |
US6894465B2 (en) * | 2002-07-10 | 2005-05-17 | Marvell World Trade Ltd. | Power array system and method |
US6933711B2 (en) * | 2002-07-10 | 2005-08-23 | Marvell World Trade Ltd. | Voltage slicer and method |
US6979988B2 (en) * | 2002-07-10 | 2005-12-27 | Marvell World Trade Ltd. | Duty cycle estimation |
US7368898B2 (en) * | 2002-07-10 | 2008-05-06 | Marvell World Trade, Ltd. | Power array system and method |
JP2004096816A (en) | 2002-08-29 | 2004-03-25 | Matsushita Electric Ind Co Ltd | Multi-output dc-dc converter |
US20040196676A1 (en) | 2003-04-01 | 2004-10-07 | Matsushita Electric Industrial Co., Ltd. | Multi-output DC-DC converter |
JP2004304987A (en) | 2003-04-01 | 2004-10-28 | Matsushita Electric Ind Co Ltd | Multi-output dc-dc converter |
US7026795B2 (en) * | 2003-07-09 | 2006-04-11 | Advanced Analogic Technologies, Inc. | Method for pulse modulation control of switching regulators |
JP2007236141A (en) | 2006-03-02 | 2007-09-13 | Matsushita Electric Ind Co Ltd | Multiple output dc-dc converter and power supply device |
US7443148B2 (en) * | 2006-09-11 | 2008-10-28 | Micrel, Inc. | Constant on-time regulator with increased maximum duty cycle |
US7482791B2 (en) * | 2006-09-11 | 2009-01-27 | Micrel, Inc. | Constant on-time regulator with internal ripple generation and improved output voltage accuracy |
KR20080051657A (en) | 2006-12-06 | 2008-06-11 | (주)제이디에이테크놀로지 | The circuit and method of sensing inductor current in dc/dc converter |
US7782036B1 (en) * | 2008-01-07 | 2010-08-24 | National Semiconductor Corporation | Adaptive on-time control for switching regulators |
US8400131B2 (en) * | 2010-03-09 | 2013-03-19 | Analog Devices, Inc. | Voltage converter and LED driver circuits with progressive boost, skip, and linear mode operation |
Also Published As
Publication number | Publication date |
---|---|
KR101259894B1 (en) | 2013-05-02 |
US20130249507A1 (en) | 2013-09-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9046904B2 (en) | Apparatus and method for controlling pulse frequency modulation in single-inductor dual-output power circuit | |
US7595624B2 (en) | Slope compensation for switching regulator | |
US8436591B2 (en) | Buck-boost converter with smooth transitions between modes | |
US8427128B2 (en) | Control circuit and method for reducing output ripple in constant on-time switching regulator | |
US7906943B2 (en) | Boost converter with adaptive coil peak current | |
US9178414B2 (en) | Jittering frequency control circuit and method for a switching mode power supply | |
US9106132B2 (en) | Boundary conduction mode switching regulator and driver circuit and control method thereof | |
US7148670B2 (en) | Dual mode buck regulator with improved transition between LDO and PWM operation | |
US8525502B2 (en) | Digital pulse-frequency modulation controller for switch-mode power supplies with frequency targeting and ultrasonic modes | |
US8907646B2 (en) | Power converting circuit and feedback control circuit | |
AU4423299A (en) | Improved power factor correction method and apparatus | |
US20080106917A1 (en) | Variable edge modulation in a switching regulator | |
US8193790B2 (en) | Switching power converter and controller | |
JP6702010B2 (en) | Switching power supply | |
JP2015089325A (en) | Dc/dc converter | |
US20120249110A1 (en) | Power converter | |
JP2012175868A (en) | Device of controlling dc-dc converter | |
US20150349645A1 (en) | Power converter controlling method | |
JP5955294B2 (en) | Switching power supply | |
US9431900B2 (en) | Dynamic operating frequency control of a buck power converter having a variable voltage output | |
US10027225B2 (en) | Switched mode power supply having a staircase current limit | |
JP2016101085A (en) | Controllers for dc/dc converter | |
JP2007135287A (en) | Dc-dc converter | |
US10804813B2 (en) | Power inverter for reducing total harmonic distortion via duty cycle control | |
US11081957B2 (en) | Power converter with multi-mode timing control |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DONGBU HITEK CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, JONGCHEOL;PARK, SEUNG NAM;REEL/FRAME:029829/0873 Effective date: 20130206 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: DB HITEK CO., LTD., KOREA, REPUBLIC OF Free format text: CHANGE OF NAME;ASSIGNOR:DONGBU HITEK CO., LTD.;REEL/FRAME:044559/0819 Effective date: 20171101 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |